US4083390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grooving of sheet material
Assignee: TOTEBO A CORP OF SWEDEN AB
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Filing: 1975-11-24
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Granted: 1978-04-11
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Expires: 1995-11-24
Abstract
Abstract A machine for cutting grooves in workpieces, particularly in sheet form, having at least one fixed cutter, support means for supporting the workpiece against the cutter and means for moving the workpiece relative to the cutter and support means. The cutter has a cutting edge defining the shape of groove to be cut and is arranged to slice through the workpiece to produce a groove leaving a constant thickness of material between the bottom of the groove and the other side of the workpiece. The forces tending to lift the workpiece from its support due to the action on the cutter of material removed thereby are overcome and a resultant force operating to press the workpiece on to its support is produced by arranging, either singly or in combination, that A. the cutter has a cutting edge substantially contained in a plane which extends forwardly in the direction of relative movement of the cutter and upwardly of the surface of the workpiece, B. the cutter has a bevel face which faces the workpiece and extend rearwardly from the cutting edge at a negative angle of clearance to the workpiece.
Inventors
- 👤 Robert Edward Ingham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:56
CPC Classifications
B; B27; B27C; B27C5/00; B27C5/006; B25; B25D; B25D3/00; B26; B26D; B26D3/00; B26D3/06; B26D3/065; B27G; B27G5/00; Y; Y10; Y10T; Y10T83/00; Y10T83/02; Y10T83/0304
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
208 words
In a groove cutting machine of the type having groove cutter means for cutting a groove in a workpiece means for holding the cutter means, 3. support means for supporting a workpiece against the cutter means during the cutting of a groove in the workpiece by the cutter means, and, 4. drive means for causing relative motion between the workpiece and the cutter means to effect the cutting of a groove in the workpiece by the cutter means, the improvement for cutting a groove in one face of the workpiece whereby a constant thickness of material remains between the bottom of the groove and the other face of the workpiece wherein i. the cutter means comprises at least one cutter whose cutting edged are located in a common plane, the shape of those cutting edges in that common plane defining the cross-section of the groove to be cut ii. the means for holding the cutter keeps the common plane of those cutting edges in a substantially constant angular position relative to the workpiece the common plane being inclined fowardly in the direction of movement of the cutter relative to the workpiece and that common plane extends upwardly from the bottom of the groove made by the cutting edges.
Claim 2
Dependent Claim
208 words
In a groove cutting machine of the type having groove cutter means for cutting a groove in a workpiece means for holding the cutter means, 3. support means for supporting a workpiece against the cutter means during the cutting of a groove in the workpiece by the cutter means, and, 4. drive means for causing relative motion between the workpiece and the cutter means to effect the cutting of a groove in the workpiece by the cutter means, the improvement for cutting a groove in one face of the workpiece whereby a constant thickness of material remains between the bottom of the groove and the other face of the workpiece wherein i. the cutter means comprises at least one cutter whose cutting edged are located in a common plane, the shape of those cutting edges in that common plane defining the cross-section of the groove to be cut ii. the means for holding the cutter keeps the common plane of those cutting edges in a substantially constant angular position relative to the workpiece the common plane being inclined fowardly in the direction of movement of the cutter relative to the workpiece and that common plane extends upwardly from the bottom of the groove made by the cutting edges.
Claim 3
Dependent Claim
34 words
The improvement according to claim 1 wherein the cutter has two straight arms connected to form a Vee, each of the straight arms having a cutting edge extending to the apex of the Vee.
Claim 4
Dependent Claim
28 words
The improvement according to claim 1 wherein the cutter and support means are stationary and the drive means is adapted to move the workpiece past the cutter means.
Claim 5
Dependent Claim
171 words
In a groove cutting machine of the type having 1. cutter means, 2. support means for supporting a workpiece during the cutting of a groove in the workpiece by the cutter means, 3. drive means for causing relative motion between the workpiece and the cutter means to effect the cutting of a groove in the workpiece by the cutter means. the improvement for cutting a groove in one face of the workpiece whereby a constant thickness of material remains between the bottom of the groove and the other face of the workpiece wherein the cutter means comprises at least one cutter having a cutting edge defining the cross section of the groove to be cut and means for holding the cutter in position to cut through the workpiece during said relative motion, said cutter being formed with a bevel face which extends rearwardly from the cutting edge and faces the workpiece, the cutter being positioned such that the bevel face has a negative angle of clearance with respect to the workpiece.
Claim 6
Dependent Claim
171 words
In a groove cutting machine of the type having 1. cutter means, 2. support means for supporting a workpiece during the cutting of a groove in the workpiece by the cutter means, 3. drive means for causing relative motion between the workpiece and the cutter means to effect the cutting of a groove in the workpiece by the cutter means. the improvement for cutting a groove in one face of the workpiece whereby a constant thickness of material remains between the bottom of the groove and the other face of the workpiece wherein the cutter means comprises at least one cutter having a cutting edge defining the cross section of the groove to be cut and means for holding the cutter in position to cut through the workpiece during said relative motion, said cutter being formed with a bevel face which extends rearwardly from the cutting edge and faces the workpiece, the cutter being positioned such that the bevel face has a negative angle of clearance with respect to the workpiece.
Claim 7
Dependent Claim
18 words
The improvement according to claim 4 wherein the negative angle of clearance is of the order of 1°.
Claim 8
Dependent Claim
41 words
The improvement according to claim 4 wherein the support means comprises a roller which is freely rotatable about a fixed axis, the said axis being positioned such that the workpiece is supported at that part which is engaged by the cutter.
Claim 9
Dependent Claim
26 words
The improvement according to claim 4 wherein the cutting means consist of at least two cutters each positioned to cut its own groove in the workpiece.
Claim 10
Dependent Claim
34 words
The improvement according to claim 7 wherein the cutters are arranged one behind the other in their direction of relative movement and positioned so that the separate grooves combine to form a composite groove.
Claim 11
Dependent Claim
43 words
The improvement according to claim 1 wherein the support means comprises a roller arranged to rotate and provide support at that part of the workpiece whch is engaged by the cutter whereby the workpiece is held against the cutting edge of the cutter.
Claim 12
Dependent Claim
54 words
The improvement according to claim 1 wherein the cutter means includes at least two cutters held by the holding means one behind the other in the direction of movement of the cutters relative to the workpiece whereby the groove cut by the leading cutter is altered by the groove cut by the succeeding cutter.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-10 | 1981-10-10 | 1982-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-10 | 1985-10-10 | 1986-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-10 | 1989-10-10 | 1990-04-11 | $7700.00 | Window Closed / Lapsed |